Stent crimping mechanisms

a crimping mechanism and stent technology, applied in the direction of prosthesis, forging/pressing/hammering apparatus, shape tools, etc., can solve the problems of reducing the life of fingers, stent and/or iris fingers may be damaged, and so as to reduce the number of blade “gaps” and the effect of reducing the possibility of pinching or damaging the sten

Active Publication Date: 2006-09-28
BOSTON SCI SCIMED INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0024] The curvature of each blade trailing edge is defined such that, the path followed by the previous blade's tip when the mechanism operates, maintains constant contact along the trailing edge of the blade next to it. Maintaining constant contact minimizes the possibility of pinching or damaging

Problems solved by technology

While such iris type mechanisms have demonstrated successful results in crimping both balloon expandable stents and self-expandable stents, it is known that in some cases, particularly involving some types of self-expanding stents, t

Method used

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Embodiment Construction

[0039] As indicated above, the present invention is embodied in a variety of forms. In at least one embodiment, such as for example in the embodiment depicted in FIG. 1, the invention is directed to a radial stent reducing assembly or crimper 10.

[0040] In the embodiment shown, crimper 10 is provided with a plurality of stent reducing members or blades 12 which define a stent reduction chamber or iris opening 14 into which a stent or other medical device (not shown) may be positioned in order to reduce the stent from an unreduced diameter state. Unlike many prior stent crimping devices, the crimper 10 in the embodiment shown in FIGS. 1-7 is constructed and arranged to provide minimal to no spacing between the adjacent blades 12, or at least between portions of the blade that are in close proximity to the stent during the crimping process, such as is sown in FIGS. 4-6.

[0041] As is shown in FIG. 2, the components of the crimper 10, include actuation elements or fingers 20 which may b...

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Abstract

A system for reducing the diameter of a stent comprises a stent contracting assembly. The assembly comprises a plurality of blades, which define a diameter reduction chamber. The chamber has an open diameter configuration and a closed diameter configuration. The plurality of blades comprises active blades and floating blades, wherein each active blade is engaged to an actuation mechanism. The actuation mechanism is constructed and arranged to move each active blade from the open diameter configuration to the closed diameter configuration. Each floating blade is moved from the open diameter configuration to the closed diameter configuration only as a result of the movement of the active blades.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] Not Applicable STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH [0002] Not Applicable BACKGROUND OF THE INVENTION [0003] 1. Field of the Invention [0004] The present invention relates generally to stents, stent loading, stent contracting and stent delivery systems and their respective methods of use. Some embodiments of the invention are more specifically directed to stent loading and crimping systems and their methods of use. [0005] 2. Description of Related Art [0006] A stent is a generally tubular device that is used to support a bodily lumen. A stent is typically delivered to a desired bodily location via a catheter. Often the stent is loaded onto a portion of the catheter, such as a balloon or other region of the catheter shaft. In some stent delivery systems the stent is crimped to the catheter in order to minimize the profile of the stent on the catheter and to prevent undesired movement of the stent relative to the catheter shaf...

Claims

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Application Information

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IPC IPC(8): B21D39/00
CPCY10T29/49913B21D39/048A61F2/95B30B7/04A61F2/9522A61F2/9524
Inventor SERRANO, GABRIEL SOBRINOMCMORROW, DAVIDAAMOTH, DENNISASMUS, BRUCEWALCH, THOMAS
Owner BOSTON SCI SCIMED INC
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